{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6877f39f94d9532117729b1c4895184766e09237fb8b005a971cd0cfea459a03",
    "signature": "0x42fe5d7eb7ddb04162ad06a5e227a2cbc3e2a472ad205cdee4f32c1fb3696d4349e84f4c3ca169113d28272085c3385a9a531bc7d065dbd7ab346fb705bfc67a1c",
    "signer": "0xfD98e1e1633d68e24edC34Ba08E36BE54aF72f4a",
    "userId": "893473168"
  }
}